add hide_self key to hide keyboard (#1329)

doc/Possible-key-values.md

@@ -190,6 +190,7 @@ Value                  | Meaning
 `voice_typing`         | Begin voice typing.
 `voice_typing_chooser` | Shows a menu where you can choose which voice typing provider to use, then begins voice typing when you make a selection.
 `shareText`            | Emit a share Intent for the selected text. **Oddity:** This is in CamelCase.
+`hide_self`            | Hide the keyboard.
 
 ## Unused
 These keys are known to do nothing.

srcs/juloo.keyboard2/KeyValue.java

@@ -24,6 +24,7 @@ public final class KeyValue implements Comparable<KeyValue>
     CAPS_LOCK,
     SWITCH_VOICE_TYPING,
     SWITCH_VOICE_TYPING_CHOOSER,
+    HIDE_SELF,
   }
 
   // Must be evaluated in the reverse order of their values.
@@ -643,6 +644,7 @@ public final class KeyValue implements Comparable<KeyValue>
       case "capslock": return eventKey(0xE012, Event.CAPS_LOCK, 0);
       case "voice_typing": return eventKey(0xE015, Event.SWITCH_VOICE_TYPING, FLAG_SMALLER_FONT);
       case "voice_typing_chooser": return VOICE_TYPING_CHOOSER;
+      case "hide_self": return eventKey("⊻", Event.HIDE_SELF, FLAG_SMALLER_FONT);
 
       /* Key events */
       case "esc": return keyeventKey("Esc", KeyEvent.KEYCODE_ESCAPE, FLAG_SMALLER_FONT);

srcs/juloo.keyboard2/Keyboard2.java

@@ -477,6 +477,9 @@ public class Keyboard2 extends InputMethodService
           VoiceImeSwitcher.choose_voice_ime(Keyboard2.this, get_imm(),
               Config.globalPrefs());
           break;
+        case HIDE_SELF:
+          Keyboard2.this.requestHideSelf(0);
+          break;
       }
     }